About This Place
Harmon is a village in Lee County, Illinois, United States. The population was 120 at the 2010 census, down from 149 at the 2000 census.
Harmon is located at 41°43′14″N 89°33′19″W / 41.72056°N 89.55528°W / 41.72056; -89.55528 (41.720660, -89.555298).
According to the United States Census Bureau, the village has a total area of 0.1 square miles (0.4 km²), all of it land.